Effective September 30, 2025, we will retire T-Uptake and transition to Free T4 for thyroid testing. T-Uptake is an older, indirect estimate that has been superseded by direct assays; using Free T4 with TSH improves diagnostic accuracy and patient care. Orders placed for T-Uptake after this date will be fulfilled with Free T4. For questions, please contact Client Services at 800-888-8598. Click here for more information.
